CN103453248A - Anti-dropping hermetically-connecting structure of pipelines - Google Patents
Anti-dropping hermetically-connecting structure of pipelines Download PDFInfo
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- CN103453248A CN103453248A CN201310382896XA CN201310382896A CN103453248A CN 103453248 A CN103453248 A CN 103453248A CN 201310382896X A CN201310382896X A CN 201310382896XA CN 201310382896 A CN201310382896 A CN 201310382896A CN 103453248 A CN103453248 A CN 103453248A
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- pipe joint
- lock washer
- connecting structure
- honeycomb duct
- anticreep
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Abstract
The invention discloses an anti-dropping hermetically-connecting structure of pipelines, which comprises a pipe joint, a flow-guiding pipe, a locknut, a sealing ring, a retainer ring and a locking gasket, wherein the end part of the flow-guiding pipe is inserted into the pipe joint, one head of the locknut is connected onto the outer wall of the pipe joint in a threaded way, a radial inward blocking part is arranged at the end part of the other head of the locknut, and the sealing ring and the retainer ring are sleeved on the flow-guiding pipe and are tightly pressed at the end part of the pipe joint through the blocking part of the locknut; the locking gasket is sleeved on the flow-guiding pipe and is positioned in the locknut, the locking gasket comprises an annular locking-gasket body, internal teeth which are distributed along a circumferential direction are arranged on the locking-gasket body, each internal tooth is inclined towards one side of the pipe joint from the locking-gasket body, a barbed tip is formed at the tail end of the internal tooth, and the tip is enclasped outside the flow-guiding pipe. The anti-dropping hermetically-connecting structure has the advantages that the flow-guiding pipe does not easily loose, and the sealing effect is stilled not influenced even though the locknut looses.
Description
Technical field
The present invention relates to a kind of linkage structure of pipeline, particularly a kind of anticreep Hermetical connecting structure of pipeline, be particularly useful for the connection of various transfusion metallic conduits or highstrenghtpiston's hard tube.
Background technique
In the pipeline of carrying liquid, the connection between pipeline usually adopts flange to connect or adopts the hatch lock collar to hold the form socket of pipeline tightly.Flange connects owing to there being the shortcoming that difficulty of processing is large, installation footprint is large, and needs welding (and some material can't weld at all), so the mode that some occasion can't be used flange to connect is carried out the pipeline connection.And while adopting the hatch lock collar to hold the form socket of pipeline tightly, need locking nut to continue that clamp ring is produced to impacting force and just can guarantee being tightly connected of pipeline, once that locking nut occurs is loosening, pipeline will get loose, and causes the leak of liquid phenomenon to occur; Due to machine intimate part installation structure compactness, limited space when locking nut is installed, cause the locking nut coupling mechanism force less than normal, and through working long hours, locking nut is easily loosening, causes pipeline to get loose.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of anticreep Hermetical connecting structure of pipeline is provided, this anticreep Hermetical connecting structure can prevent from leaking because of nut loosening.
The present invention realizes that the technological scheme of above-mentioned purpose is:
A kind of anticreep Hermetical connecting structure of pipeline, comprise pipe joint, honeycomb duct, locking nut, seal ring and back-up ring, wherein, the end of honeycomb duct is inserted in pipe joint, one head thread of locking nut is connected on the pipe joint outer wall, the end of other end is provided with radially inner stop part, and described seal ring and shield ring sleeve are pressed on the end of pipe joint on honeycomb duct and by the stop part of locking nut; It is characterized in that, also comprise lock washer, this lock washer is enclosed within on honeycomb duct and is positioned at locking nut, be followed successively by seal ring, back-up ring and lock washer from the end of pipe joint between the stop part of locking nut, wherein, lock washer comprises annular lock washer body, this lock washer body is provided with a plurality of internal tooths that along the circumferential direction distribute, this internal tooth is by the lock washer body towards the pipe joint lopsidedness, and the end of this internal tooth forms the tip of reversed acanthoid, and hold tightly outside honeycomb duct at this tip.
A preferred version of the present invention, wherein, described internal tooth along the circumferential direction is uniformly distributed, and this internal tooth extends to form towards the pipe joint lopsidedness from the inner ring surface of lock washer body, and the connection part place of internal tooth and lock washer body is arranged to arc transition.
A preferred version of the present invention, wherein, the end of described internal tooth has the clinoplain towards pipe joint, and edge corresponding with the honeycomb duct outer wall in this clinoplain, described tip forms.Further, described tip is circular arc, that is this tip is the sharp limit along the circular arc of the circumferencial direction of honeycomb duct.
A preferred version of the present invention, wherein, described honeycomb duct is aluminum pipe, thrust in the body of honeycomb duct at the tip of described internal tooth.
A preferred version of the present invention, wherein, this anticreep Hermetical connecting structure is two, is arranged at respectively the two ends of pipe joint.By described pipe joint and two anticreep Hermetical connecting structures, two honeycomb ducts are linked together.
A preferred version of the present invention, wherein, an end corresponding with lock washer in described back-up ring is provided with recess, and the inboard of the stop part of described locking nut is provided with conical surface, and the minimum diameter of this conical surface is less than the external diameter of lock washer body; Internal tooth in described lock washer extend in described recess, and a side of lock washer body is adjacent on the end face of back-up ring, and the outer diameter side of another side is along being adjacent on the conical surface of stop part.
A preferred version of the present invention, wherein, the end face of described pipe joint is provided with plane of inclination, and described seal ring acts on this plane of inclination.
A preferred version of the present invention, wherein, described seal ring is O type rubber seal; Described honeycomb duct is metal tube or plastic rigid pipe.
A preferred version of the present invention, wherein, described honeycomb duct is the oil guide pipe on the flow measurement converter be connected in oilling machine, this honeycomb duct is metal tube or plastic rigid pipe.
The working principle of the anticreep Hermetical connecting structure of pipeline of the present invention is:
After anticreep Hermetical connecting structure of the present invention installs, the stop part of locking nut is pressed on seal ring on the end of pipe joint by lock washer and back-up ring successively, formation is tightly connected, now outside honeycomb duct (can be also slightly to penetrate in the body of honeycomb duct) be held at the tip of the internal tooth in lock washer tightly, due to described internal tooth towards the pipe joint lopsidedness, if therefore honeycomb duct occurs along the axial float that breaks away from the pipe joint direction, can pull the internal tooth distortion to make the internal diameter of internal tooth further dwindle, thereby increase coupling mechanism force, and the axial tension of honeycomb duct is larger, the coupling mechanism force of lock washer is also larger, realize self-locking, thereby make the honeycomb duct can't play, guarantee sealing effect.
The present invention compared with prior art has following beneficial effect:
1, under hydrodynamic pressure or other external pull effects, play can not occur in honeycomb duct, guarantees to be tightly connected, and does not reveal.
Even 2 in the situation that locking nut do not tighten or occur loosening, lock washer still with honeycomb duct locking, guarantee that seal ring can be pressed on the end of pipe joint, still guarantees sealing effect.
3, simple in structure, easy processing, play hoop than existing double over much easier, to the tubing processibility, requires lower.
The accompanying drawing explanation
The structural representation (analysing and observe) of an embodiment of the anticreep Hermetical connecting structure that Fig. 1 is pipeline of the present invention.
The axial explosive view that Fig. 2 is Fig. 1.
The A-A sectional view that Fig. 3 is Fig. 2.
The sectional view that Fig. 4 is locking nut in Fig. 1.
The structural representation that Fig. 5 and Fig. 6 are lock washer in Fig. 1, wherein, Fig. 5 is plan view, Fig. 6 is left view (analysing and observe).
Fig. 7 is the schematic diagram of the working principle of demonstration anticreep Hermetical connecting structure of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Referring to Fig. 1～Fig. 6, the anticreep Hermetical connecting structure of pipeline of the present invention comprises pipe joint 5, honeycomb duct 6, locking nut 1, seal ring 4 and back-up ring 3, wherein, the end of honeycomb duct 6 is inserted in pipe joint 5, one head thread of locking nut 1 is connected on pipe joint 5 outer walls, the end of other end is provided with radially inner stop part 1-1, and described seal ring 4 and back-up ring 3 are enclosed within on honeycomb duct 6 and are pressed on the end of pipe joint 5 by the stop part 1-1 of locking nut 1; In addition, also comprise lock washer 2, this lock washer 2 is enclosed within on honeycomb duct 6 and is positioned at locking nut 1, be followed successively by seal ring 4, back-up ring 3 and lock washer 2 from the end of pipe joint 5 between the stop part 1-1 of locking nut 1, wherein, lock washer 2 comprises annular lock washer body 2-1, this lock washer body 2-1 is provided with a plurality of internal tooth 2-2 that along the circumferential direction distribute, this internal tooth 2-2 by lock washer body 2-1 towards pipe joint 5 lopsidedness, the end of this internal tooth 2-2 forms the most advanced and sophisticated 2-3 of reversed acanthoid, and this tip 2-3 holds tightly outside honeycomb duct 6.
Particularly, referring to Fig. 1～Fig. 6, described internal tooth 2-2 is 10, along the circumferential direction be uniformly distributed, this internal tooth 2-2 body is sheet, and its inner ring surface from lock washer body 2-1 extends to form towards pipe joint 5 lopsidedness, and the connection part place of this internal tooth 2-2 and lock washer body 2-1 is arranged to arc transition, stressed to improve, prevent that stress is concentrated.The end of described internal tooth 2-2 has the clinoplain towards pipe joint 5, described most advanced and sophisticated 2-3 edge corresponding with honeycomb duct 6 outer walls in this clinoplain forms, and this edge is the circular arc be complementary with honeycomb duct 6 surfaces, that is this tip 2-3 sharp limit that is circular arc.In present embodiment, described honeycomb duct 6 is aluminum pipe, and during work, the most advanced and sophisticated 2-3 of described circular arc is surrounded on outside aluminum pipe, and thrusts slightly in the body of honeycomb duct 6, thereby improves the effect of holding tightly, prevents that honeycomb duct 6 from getting loose.
Referring to Fig. 1～Fig. 6, an end corresponding with lock washer 2 in described back-up ring 3 is provided with recess 3-1, and 3-1 is tapered for this recess, with described internal tooth 2-2, is complementary; The inboard of the stop part 1-1 of described locking nut 1 (i.e. a side corresponding with lock washer 2) is provided with conical surface 1-2, and the minimum diameter of this conical surface 1-2 is less than the external diameter of lock washer body 2-1; Internal tooth 2-2 in described lock washer 2 extend in recess 3-1, and the side of lock washer body 2-1 is adjacent on the end face of back-up ring 3, and the outer diameter side of another side is along being adjacent on the conical surface 1-2 of stop part 1-1.By the stop part 1-1 place at locking nut 1, conical surface 1-2 is set, like this, in locking nut 1 is tightened on to the process of pipe joint 5, conical surface 1-2 position can constantly produce extruding to seal ring 4 along with locking nut 1 and the degree that screws of pipe joint 5, thereby has guaranteed the sealing effect of seal ring 4.
Referring to Fig. 1～Fig. 5, the end face of described pipe joint 5 is provided with plane of inclination 5-1, and it is upper that described seal ring 4 acts on this plane of inclination 5-1, and sealing circle 4 is O type rubber seal.By described plane of inclination 5-1 is set, form shrink space between this plane of inclination 5-1 and honeycomb duct 6, like this when back-up ring 3 press seal circle 4, increase along with impacting force, seal ring 4 constantly is compressed in shrink space, thereby be closely attached on tightly the outer surface of plane of inclination 5-1 and honeycomb duct 6, obtain good sealing effect.
In present embodiment, described honeycomb duct 6 is for being connected to the oil guide pipe on the flow measurement converter in oilling machine, the two ends of pipe joint 5 all form an above-mentioned anticreep Hermetical connecting structure, thereby by these two anticreep Hermetical connecting structures, two oil guide pipes are coupled together.
Working principle below in conjunction with accompanying drawing to anticreep Hermetical connecting structure of the present invention is further described:
Referring to Fig. 6, after installing, the stop part 1-1 of locking nut 1 is pressed on seal ring 4 on the plane of inclination 5-1 of end of pipe joint 5 by lock washer 2 and back-up ring 3 successively, formation is tightly connected, and now the most advanced and sophisticated 2-3 of the internal tooth 2-2 in lock washer 2 holds tightly outside honeycomb duct 6 (in seeing figure a).Due to described internal tooth 2-2 towards pipe joint 5 lopsidedness, it occurs when breaking away from the axial float of pipe joint 5 directions to have a directed force F on honeycomb duct 6, can pull internal tooth 2-2 distortion to make the internal diameter of internal tooth 2-2 dwindle, coupling mechanism force increases, the most advanced and sophisticated 2-3 of internal tooth 2-2 can penetrate into the body interior (seeing b in figure) of honeycomb duct 6 slightly, increase along with F, the internal diameter of internal tooth 2-2 further dwindles, the most advanced and sophisticated 2-3 of internal tooth 2-2 can deeper penetrate into the body interior (seeing c in figure) of honeycomb duct 6, make the honeycomb duct 6 can't play, guarantee sealing effect.And loosening even locking nut 1 occurs, the coupling mechanism force between lock washer 2 and honeycomb duct 6 is still constant, so can not affect because of the loosening of locking nut 1 sealing effect.
Above-mentioned is preferably mode of execution of the present invention; but embodiments of the present invention are not subject to the restriction of foregoing; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. the anticreep Hermetical connecting structure of a pipeline, comprise pipe joint, honeycomb duct, locking nut, seal ring and back-up ring, wherein, the end of honeycomb duct is inserted in pipe joint, one head thread of locking nut is connected on the pipe joint outer wall, the end of other end is provided with radially inner stop part, and described seal ring and shield ring sleeve are pressed on the end of pipe joint on honeycomb duct and by the stop part of locking nut; It is characterized in that, also comprise lock washer, this lock washer is enclosed within on honeycomb duct and is positioned at locking nut, be followed successively by seal ring, back-up ring and lock washer from the end of pipe joint between the stop part of locking nut, wherein, lock washer comprises annular lock washer body, this lock washer body is provided with a plurality of internal tooths that along the circumferential direction distribute, this internal tooth is by the lock washer body towards the pipe joint lopsidedness, and the end of this internal tooth forms the tip of reversed acanthoid, and hold tightly outside honeycomb duct at this tip.
2. the anticreep Hermetical connecting structure of pipeline according to claim 1, it is characterized in that, described internal tooth along the circumferential direction is uniformly distributed, this internal tooth extends to form towards the pipe joint lopsidedness from the inner ring surface of lock washer body, and the connection part place of internal tooth and lock washer body is arranged to arc transition.
3. the anticreep Hermetical connecting structure of pipeline according to claim 2, is characterized in that, the end of described internal tooth has the clinoplain towards pipe joint, and edge corresponding with the honeycomb duct outer wall in this clinoplain, described tip forms.
4. the anticreep Hermetical connecting structure of pipeline according to claim 3, is characterized in that, described tip is circular arc.
5. according to the anticreep Hermetical connecting structure of the described pipeline of any one in claim 1～4, it is characterized in that, described honeycomb duct is aluminum pipe, and thrust in the body of honeycomb duct at the tip of described internal tooth.
6. the anticreep Hermetical connecting structure of pipeline according to claim 1, is characterized in that, this anticreep Hermetical connecting structure is two, is arranged at respectively the two ends of pipe joint.
7. according to the anticreep Hermetical connecting structure of the described pipeline of any one in claim 1～4,6, it is characterized in that, an end corresponding with lock washer in described back-up ring is provided with recess, the inboard of the stop part of described locking nut is provided with conical surface, and the minimum diameter of this conical surface is less than the external diameter of lock washer body; Internal tooth in described lock washer extend in described recess, and a side of lock washer body is adjacent on the end face of back-up ring, and the outer diameter side of another side is along being adjacent on the conical surface of stop part.
8. the anticreep Hermetical connecting structure of pipeline according to claim 7, is characterized in that, the end face of described pipe joint is provided with plane of inclination, and described seal ring acts on this plane of inclination.
9. the anticreep Hermetical connecting structure of pipeline according to claim 1, is characterized in that, described seal ring is O type rubber seal; Described honeycomb duct is metal tube or plastic rigid pipe.
10. the anticreep Hermetical connecting structure of pipeline according to claim 1, is characterized in that, described honeycomb duct is the oil guide pipe on the flow measurement converter be connected in oilling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310382896.XA CN103453248B (en) | 2013-08-28 | 2013-08-28 | A pipeline anti-sealed connection structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310382896.XA CN103453248B (en) | 2013-08-28 | 2013-08-28 | A pipeline anti-sealed connection structure |
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| CN103453248A true CN103453248A (en) | 2013-12-18 |
| CN103453248B CN103453248B (en) | 2016-01-27 |
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| CN201310382896.XA Active CN103453248B (en) | 2013-08-28 | 2013-08-28 | A pipeline anti-sealed connection structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122474A (en) * | 2016-08-18 | 2016-11-16 | 托肯恒山科技（广州）有限公司 | A kind of leakage-resistant device for fuel charger confined space |
| CN107542980A (en) * | 2016-06-24 | 2018-01-05 | 中船重工海博威（江苏）科技发展有限公司 | A kind of traveling nut is connected device |
| CN108869927A (en) * | 2018-09-05 | 2018-11-23 | 成都中建材光电材料有限公司 | A kind of quartz ampoule Hermetical connecting structure |
| CN111853384A (en) * | 2020-07-07 | 2020-10-30 | 邱强生 | A kind of compression sealing pipeline quick fitting |
| CN113294610A (en) * | 2021-07-01 | 2021-08-24 | 宁波慧创新材料科技有限公司 | Connector structure of refrigerant pipe |
| CN119280647A (en) * | 2024-11-13 | 2025-01-10 | 临沂市兴华医用器材有限公司 | A conical conduit connector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0893975A (en) * | 1994-09-28 | 1996-04-12 | Hitachi Metals Ltd | Flareless type tube fitting |
| JPH10288287A (en) * | 1997-04-15 | 1998-10-27 | Mitsubishi Heavy Ind Ltd | Pipe joint |
| JP2002213664A (en) * | 2001-01-22 | 2002-07-31 | Nkk Corp | Pipe fittings |
| CN201568664U (en) * | 2009-12-18 | 2010-09-01 | 浙江黄岩天雁塑胶有限公司 | Pipe connection device |
| CN202032206U (en) * | 2011-03-21 | 2011-11-09 | 浙江快科科技有限公司 | Double-cutting sleeve type tube connector |
| CN203404516U (en) * | 2013-08-28 | 2014-01-22 | 托肯恒山科技（广州）有限公司 | Anti-disengaging sealing connecting structure of pipeline |
-
2013
- 2013-08-28 CN CN201310382896.XA patent/CN103453248B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0893975A (en) * | 1994-09-28 | 1996-04-12 | Hitachi Metals Ltd | Flareless type tube fitting |
| JPH10288287A (en) * | 1997-04-15 | 1998-10-27 | Mitsubishi Heavy Ind Ltd | Pipe joint |
| JP2002213664A (en) * | 2001-01-22 | 2002-07-31 | Nkk Corp | Pipe fittings |
| CN201568664U (en) * | 2009-12-18 | 2010-09-01 | 浙江黄岩天雁塑胶有限公司 | Pipe connection device |
| CN202032206U (en) * | 2011-03-21 | 2011-11-09 | 浙江快科科技有限公司 | Double-cutting sleeve type tube connector |
| CN203404516U (en) * | 2013-08-28 | 2014-01-22 | 托肯恒山科技（广州）有限公司 | Anti-disengaging sealing connecting structure of pipeline |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542980A (en) * | 2016-06-24 | 2018-01-05 | 中船重工海博威（江苏）科技发展有限公司 | A kind of traveling nut is connected device |
| CN106122474A (en) * | 2016-08-18 | 2016-11-16 | 托肯恒山科技（广州）有限公司 | A kind of leakage-resistant device for fuel charger confined space |
| CN106122474B (en) * | 2016-08-18 | 2019-02-05 | 托肯恒山科技（广州）有限公司 | A kind of leakage-resistant device for fuel charger confined space |
| CN108869927A (en) * | 2018-09-05 | 2018-11-23 | 成都中建材光电材料有限公司 | A kind of quartz ampoule Hermetical connecting structure |
| CN111853384A (en) * | 2020-07-07 | 2020-10-30 | 邱强生 | A kind of compression sealing pipeline quick fitting |
| CN111853384B (en) * | 2020-07-07 | 2025-07-18 | 邱强生 | Quick-mounting joint for compression sealing pipeline |
| CN113294610A (en) * | 2021-07-01 | 2021-08-24 | 宁波慧创新材料科技有限公司 | Connector structure of refrigerant pipe |
| CN119280647A (en) * | 2024-11-13 | 2025-01-10 | 临沂市兴华医用器材有限公司 | A conical conduit connector |
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| Publication number | Publication date |
|---|---|
| CN103453248B (en) | 2016-01-27 |
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